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Magnetic grinding abrasive and preparation thereof

A magnetic abrasive and abrasive technology, applied in chemical instruments and methods, and other chemical processes, can solve problems such as difficulty in forming an ideal magnetic brush, weak grinding ability, and low efficiency of magnetic grinding

Inactive Publication Date: 2011-06-15
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another disclosed technology mentions a magnetic abrasive whose components include iron powder 60wt%-90wt%, hard abrasive powder 10wt%-wt40%, cyanoacrylate glue 3wt%-5wt% after bonding A magnetic composite phase abrasive is obtained, but whether it is a composite phase abrasive made by bonding or a composite phase abrasive made by hot pressing and sintering, it has strong magnetism, so it is easy to attract each other into agglomerates in a magnetic field, and it is difficult to An ideal magnetic brush is formed, resulting in low efficiency of magnetic grinding. In the prior art, stainless steel needles or stainless steel balls with no wrapping on the surface are used as magnetic abrasives. Although this abrasive can form a brush-like Magnetic brush, but its polishing or grinding ability is not ideal, especially when using this abrasive to polish non-magnetic workpieces, the grinding ability is weak

Method used

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  • Magnetic grinding abrasive and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Put corundum, kaolin, silica powder, and water into a mechanical mixer in a weight ratio of 16:1:1:2, and mix for 1 hour to obtain a slurry.

[0036] 2. First put steel balls with a diameter of 0.5mm into the mold, and then pour the slurry, in which the weight ratio of stainless steel balls to slurry is 2:1. After curing for 1 hour at room temperature, demould to make The steel ball is the "core", and the slurry is the abrasive blank of the "film".

[0037] 3. Send the embryo into a high-temperature furnace for sintering, the sintering temperature is 1300°C, and the time is 24 hours.

[0038] 4. After the abrasive is cooled, the first abrasive with an average film thickness of 0.25 mm is obtained.

Embodiment 2

[0040] 1. Put corundum, kaolin, silica powder, and water into a mechanical mixer in a weight ratio of 16:1:1:2, and mix for 1 hour to obtain a slurry.

[0041] 2. Put steel balls with a diameter of 1.3mm into the mold first, and then pour the slurry, in which the weight ratio of stainless steel balls to slurry is 2:1. After curing for 2 hours at room temperature, demould to make The steel ball is the "core", and the slurry is the abrasive blank of the "film".

[0042] 3. Send the embryo into a high-temperature furnace for sintering, the sintering temperature is 1320°C, and the time is 30h.

[0043] 4. After the abrasive is cooled, the second abrasive with an average film thickness of 0.5 mm is obtained.

Embodiment 3

[0045] 1. Put corundum, kaolin, silica powder, and water into a mechanical mixer in a weight ratio of 16:1:1:2, and mix for 1 hour to obtain a slurry.

[0046] 2. First put steel balls with a diameter of 2mm into the mold, and then pour the slurry, in which the weight ratio of stainless steel balls to slurry is 2:1. After curing for 3 hours at room temperature, demould to make The steel ball is the "core", and the slurry is the abrasive blank of the "film".

[0047]3. Send the embryo into a high-temperature furnace for sintering, the sintering temperature is 1350°C, and the sintering time is 48h.

[0048] 4. After the abrasive is cooled, the third abrasive with an average film thickness of 0.7 mm is obtained.

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Abstract

The invention provides a magnetic abrasive material and a method for preparing the magnetic abrasive material. The magnetic abrasive material is an acicular or spherical magnetic abrasive material with the structure of a core and a film, the core is a stainless pin or a stainless steel ball, and the film is ceramics. Through the method for preparing the magnetic abrasive material provided by the invention, a magnetic abrasive material which has strong polishing or grinding capacity and can form an ideal magnetic brush is obtained.

Description

technical field [0001] The invention relates to a magnetic grinding abrasive and a preparation method thereof. Background technique [0002] Magnetic grinding technology is a finishing technology, because the magnetic abrasive used in it can form a magnetic brush with self-sharpening and special adaptability. Therefore, this technology is being used more and more in the field of production, especially in the fields of complex shape workpieces and precision polishing. The preparation of magnetic abrasive is an important part of magnetic grinding technology, and it is also an important factor restricting the development of magnetic grinding technology. Therefore, inventing a magnetic abrasive with strong grinding ability and high grinding efficiency has become the current primary task, and the successful development of new magnetic abrasive has far-reaching significance for the rapid development of magnetic grinding technology. Since the emergence of magnetic grinding techno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/14
Inventor 付才林
Owner BYD CO LTD
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